Fig. 3From: In-vitro examination of the positive inotropic effect of caffeine and taurine, the two most frequent active ingredients of energy drinksRelative contractile force values of all trails on a logarithmic scale. Group 2 and 3 showed significant increases (118 ± 03% and 124 ± 4% with p-value <0.01 for both), while group 1 showed no change at allBack to article page